COZY 90N30A Instrucciones De Instalación Y Funcionamiento página 10

7
6
Typical Installation Using
3
1. Adequate clearances around floor furnace.
2. Draft Diverter 6" from combustibles.
3. Adequate clearances around vent pipe.
4. Horizontal vent pipe sloping upward 1/4" per foot.
5. Pipe supported with metal straps.
6. Adequate height of vent system.
7. Listed vent cap.
5
4
3
The gas piping system must meet the requirements of local codes or the specifications of the servicing gas supplier. It must have
adequate capacity to supply the floor furnace and any other appliance within the home with enough gas to maintain the full rated
capacities without excessive pressure drop when all appliances are operating at full rate.
GAS PIPE SIZES - CAPACITY NATURAL GAS ○
Length
Inside Pipe Diameter
of Pipe -
Feet
1/2" 3/4"
10 132,000 278,000
20 92,000 190,000
30 73,000 152,000
40 63,000 130,000
50 56,000 115,000
60 50,000 105,000
○ Based on heating value of 1,000 value of 1,000 BTU per cubic
foot (specific gravity of 0.6) at 0.5 PSIG and a pressure drop
of 0.3 inch water column.
Support the piping or tubing at regular intervals with metal pipe strapping. See charts below.
Nominal Steel Pipe Size
1/2"
3/4" or 1"
• Where local conditions include earthquake, tornado, unstable ground or flood hazards, give special consideration to increased
strength and flexibility of piping supports and connections. Consult local authorities for recommendations.
• All unused openings in the piping system must be securely closed gas-tight.
CONNECTING THE VENT
Class "B" Vent Pipe
2
1
GAS SUPPLY AND PIPING
1"
520,000
350,000 Capacity
285,000 BTU
245,000 Per Hr.
215,000 Input
195,000
Spacing of Supports
6'
8'
If more than one gas appliance is vented through a
FIG. 9
common vent system, the vent should be increased
in size to accommodate the increased load. Consult
your local code or the tables in the latest edition
of NFPA54 / ANSI.Z223.1 for the correct size. If
no local codes apply, use the following alternate
method for sizing a vent connected to more than one
appliance. The effective area of the vent must be
not less than the area of the largest vent connection
plus 50 percent of the areas of additional draft hood
outlets.
The homeowner
workmanship and the neat installation usually
functions better than the sloppy one. Double check
your work to verify that all clearances around the
floor furnace and vent system are adequate and
that the vent system is installed to code or pipe
manufacturers specifications. See Figure 9.
GAS TUBING AND PIPE SIZES - CAPACITY PROPANE GAS *
Copper Tubing
Length
Outside Diameter**
of Pipe /
Tubing Feet
1/2"
10 92,000 329,000
20 62,000 216,000
30 50,000 181,000
40 41,000 145,000
50 37,000 131,000
60 35,000 121,000
* Undiluted Liquefied Petroleum Gas at 11 inches water column inlet pressure.
Based on a pressure drop of 0.5 inches water column.
** Copper tubing must comply with limitations of NATIONAL FUEL GAS CODE
reference 2.6.3 metallic tubing.
*** Steel pipe should be of at least standard weight (Schedule 40).
Nominal Size of Tubing O.D.
1/2"
5/8" or 3/4"
Page 9
appreciates neatness
Steel Pipe
Inside Diameter***
3/4" 1/2" 3/4"
275,000 567,000
189,000 393,000
152,000 315,000
129,000 267,000
114,000 237,000
103,000 217,000
Spacing of Supports
4'
6'
Back to Index
in
Capacity
BTU
Per Hr.
Input
1017826-A